SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '7e17f7b39eb7637c4b520a97a5b8b07f3b0261d6a6faaed864102146855d6e49' 
  AND token = 'e9J65BwbcgO/Zmjsqk4s5ObqTNwMkvEJszRKqpLxkkQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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