Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd3b11acc3db408a236da95ab999e87de700946cf2f8706921afc96eb101714ef' 
  AND token = 'igdwP8AQo2Rf0Y9q043MjSqIg3moVqUH00B32ew7FgA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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