Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b8092e5d279f5240280cb79059f22c2ddefcd9e8f9d1cc085d960390ba7501b8' 
  AND token = 'C/Cx0t/3bG+atkR26UKMQ4G7oiXtdptU5AUn81GU7UA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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