Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd67fe7863211deb60fe798648b42c3d4c18fe45579c81153b9c446a85d949db0' 
  AND token = 'El9BK1to2QiMsWFubVWLch7BU7QseELRSTVZk81EMTI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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