SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '35a7d61316b976458255a93250058acf9c56e3c73484701cef9426a2decaae07' 
  AND token = 'IvDSrOmFxqJHjHYvAjQNYMGzLez5GBlJumRhpKC+s5s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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