Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f3215fba6fb79f533762446b22372276ad33d1e408fb0caa4fc7cd7bc531300f' 
  AND token = '/wiaP7mIM8RcAcWjLtd0HiDbX5ikB4dtxf4OUEVzLfo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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