Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8ce6709586eee64ff58d523a98c96bad221e80c2c5026cd68780a391b0e877c8' 
  AND token = '5EuX3Oku1SD8P5FnR/hLy18pojbuwNgtng4sbNbTvpY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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