SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '07726b087897d942c95995d4157be9eb084a8fc2a3a65f223a6a6b9d28cf765d' 
  AND token = 'QPW5IhVKnwF+ttErADVPpkBoAct/JgHGBJLE+ZorghM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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