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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '98a4cb5c6733e9c173d98e2dab5c73330d583f3f62f7b8f1e373863f8e18fb9d' 
  AND token = 'e34KKPFt4p08386YEi+VIJ1WqidQhP7SPgTj//4qoPw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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