Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '37b6055a784a6a5ae7ace04550e2f74e84c7e03c8424e8d2bbd751e30aa9dfe2' 
  AND token = 'DPE9r6u6CVcZ+P20fPVEs/S9izkfecMEhlSbQ1O0BFs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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