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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4fac1e9384d5592bb43f8c6b094fc7dddc5e0161bd63fe9b953926136722bcc2' 
  AND token = 'tQMdhkA1HB6gqKQfrKrprS0cOPccq2T8XqBkoungOio=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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