SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '887cdf11566d51f3761b351a418f4557be5c8cf11191fd302effc4699bb366f0' 
  AND token = '7gXAO1VX7GNh2A+YbfKPQMjcxUjszYYTQzeGXqxCRXA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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