SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e222a1f78360c61438f38aa5c8fb475df973e87fc89893e8fcc2d8a6376e68f0' 
  AND token = '8yCnfZGGIVzwODLrWQQ31oczvT39vR3cP1MQ1+yyet0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00069

JSON explain

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