Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0c9028f2da84c3acfc44fc8b5decfe661d13218d959e8ee136985f9131165354' 
  AND token = 'O8aqK0U/kiDtPmcd6T/vbBZblA4a7wjPMXhdEMEPszo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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