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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3c1c8b401e07440b16aec7a7d2559203153bcae7ab23d86d4486a5f01f936f38' 
  AND token = 'Qxsr/NYoRie80IXlBVR3AFYG4/ISidTW3sy1noXUDPo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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