Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8fcf9d890fd7bab92264d4a86b8bb6947476e0d664f23f3fbcbf8b8aa036a8fb' 
  AND token = 'qMyo5k2hhULecFzuLqoO956J8nlmYTYb8Nz3pcRD7oE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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