Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4b6413eb3f2f7bbb892eacc60195215400cab372a1089331738e05dc3a703a8a' 
  AND token = 'AZezTLe+KClhAWHEky5XwjO3KkRMEQSzHymziI+QFZI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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