Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e4dcc297a9466a2d4158e408de79121a082b33d63372a924c4b2aef9722c9869' 
  AND token = '47OKhlMaKEOu+TRlZAhx8ADiqnoIrEgsKax9VsuQU4g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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