Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cacdcc750501909c947c4587ff79376ca583f3c4b68ea1ab484f9b2bb0f56927' 
  AND token = 'Ye+fVrS9AmWJ0H0xkvSvBo04bB7Psq9XQ+6vKK0AHzA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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