Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '71527781665c58e3cc8483a096fd3acaae28858487c2b44d792bf2e447b2b0a8' 
  AND token = 'Hj2FeVzB6ebNl2Z4V7s3vy7S0kaLeJoM1VpJQwqVXNY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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