Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a0ad07e7d4da784b4e559249544ae6053a64e8c2162fb6854b1d64c8a983a0a1' 
  AND token = 'DwmRcgyYF7fJB8fCGRkZ1XJ+H2k9F6NxC2Wg1qr25yE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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