Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '38d2843067b2050d3328d88f3872054b2968cdb477ae6c638089e7672a3f114b' 
  AND token = '2LmtG1EkzLQwQ/67vZdiYYuk8No304S4sC3bxFeyEfs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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