Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '54ac2597fb300c984edd8b0520be309db0cfe0f1afd1bb47b9d5f0f77009714f' 
  AND token = '8rsqwBXU9u7Z6uadRZzhsXPrHvlGEi+MTw03AJzxHhY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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