SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a07f54be79b1337214d6bf699597bfd9e4799888bca9872c2d345a26a33e15cd' 
  AND token = 'geunMYlF1RhqY7CuBsekBypaJ76gWX5ZWVHudc5ZJhU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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