Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6eb005a77576de2a8b59dc9843e8ab6ea5451d0db7531b5d973b26e4393a080e' 
  AND token = 'hmHYuvYwaszSPc2uHDmTRmiqKGOE7G46R+2BBXj+0uA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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