Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0ba48e65eb58ccb1cfc5da54782d660802267758cc45112acbbd10c1ff809523' 
  AND token = 'WHf7s40ptiqZq2Meq9Jv5J4ryhbi65AxCT3BSUmCB6s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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