SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '98259d33fab0fccc4b3d66f94fbcd72fdd7fc809711a8b9c468784579ac80d8b' 
  AND token = 'G4yFvSvhY1Kwkm3iG2/apsJJWKyX8Pcog9xVnh0pLas=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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