SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eedc108103287a2f728f05d8fcc99aab4ee8fbf1c66e4fc3d40bf14d668e881b' 
  AND token = 'BoIK97BwmJVGbemFNB4SPM5/M+7dHPJq/8j0uz+7+cQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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