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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd4692749b8cd8ba10b26734ad62679e54f50765bdfcf84afba55277d059f1174' 
  AND token = 'YKttjJfPJ01EpBb2M3SZkcJO+2mbOk4zvdy7k/6SUkk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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