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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'daf4bd5828fa78c56a006df39fda9501466bb94608193de1e25bf2b925b4ad54' 
  AND token = '9Vddh7CmhtWUcT51jQqX/mSwoWipNklEaYdpQuKl3eY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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