Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '752c8eb3956b36b19eb4d2d9bcafff81c907e39676f6b992eb6887f784a1ee9f' 
  AND token = 'Lz7TOU0PG0Y3Qw7+wPPGapmm1VnftlNKPfbjw8bnqS0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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