Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a89926cceb1ab11c11fae94172e4a97d31c5bd9e9b845472e993d93a26a2fd70' 
  AND token = 'PLx0ATje/PYtsu7Zv/PG/fR4u2dMHYSyZFy3pUoRCZY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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