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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '191e691dc75fe6460cf77228ca89b15c275695b1a563e329c1295860f50c3388' 
  AND token = '4pgG29oVDlcVY09nWk1E5K9HMIkhN3CdeRJQr4VWR78=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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