Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9c9d10e012961f0895c17c9298c2bfdaa05a31174f327cdade241b55fc01d802' 
  AND token = 'uxPRk6MiwSrGptkGOdPmSkv8DtSqWAxtzELzw9v1OMw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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