Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f3345869b3c13c98068b1a84f222bc5380a5f158eff4032c7cb55a641fba90a5' 
  AND token = 'DuJj1f0dFOXjq5LKW+V50d5QC/Z/+1kt6Y8srdulpF8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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