SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'cfd695bc3e032b567d2d7dc16f4edfaffaf77bd02f2265e82b246694ebba2de8' 
  AND token = '+tukFWZpgr66BZdOoYjaVCgVJgUXp/nFcNFDzJyWphM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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