SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7abaf89f7a3b92a1528c6f2d5a425adf55522a9b7dc39c1d93a5b9690a30cc6a' 
  AND token = 'J6TuIxx/q1qsjCMYVLRwkl3wgmi+Z2aJWsryS+z6Z2o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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