SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '49567b42a5ca41ef10b50cd06ef1ceda674b67bb54e1982c02163c47a941f909' 
  AND token = '3C+NW1X7XXBKbezasgXppqmjvZ6ZVP+Qt+LsUug2T7Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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