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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1ec5e4375cbd895f2d5d9854f679366343c09f3d161ce77ffa5212306123172a' 
  AND token = 'BdFZbNkQY1Xa8T1FG5zIpPP5krX3csL8sCVtXFJvfxM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}