Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '70140b68122701e91d511d385791ee79209f80dac108f29ee17e9c78110870f3' 
  AND token = 'z2l1RlCTrlRMEoAxeNwvIh/doXZMPN5c2hccclfPFjc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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