Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ce7daa619102e090fc5a3c7cb0aeba13322a693a823174903c03df812870718a' 
  AND token = 'QPMNeYMY6y5cgwtj8ACGhlPaFOwZ5XOz+t54hK7tb7s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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