Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8592781e2493cf6441887739c17866d6439ac88507fe783785b1b13e3ab0b8f7' 
  AND token = 'lFonvD7BoXpzAIKfInKQuu9hwSqlcCu8SjSJK86ON44=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}