SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c6bd7373f537248839cfff3ec7ca924e6620b5cc0c219698010f9e573d8b6b5b' 
  AND token = 'AVVGfQ8iRJpxPm276CxqjWqfKKq/4eZ4GG1SkC2A3CY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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