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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '559fd6bec81b01ef996b4466c24dc96768699e267958add65e779795a28ea17e' 
  AND token = 'epzSMwL17a3gq9dAa+9L215rKxf2mley5lftWNg9Muw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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