Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9c65fb64c36144dc7186d2c471d846fc65c2a42b534c94a9b8505cdbbfd6170a' 
  AND token = 'ooxEWZwT1A4eCFegYJ5ZadiRQqA1BC1Q51PvSJWlWVI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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