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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '58c4a5019c4a7fe901a22d6172d720ada1218148bd34ef20c330805f01f1011c' 
  AND token = 'fC3Zbh6fMq6JNX9kH5KiQoGOPe/woKtLvx1BRRibgNw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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